How to lock all toolbars via menu in Qt?

Question

I am experimenting with Qt Creator and the Application Example.

I would like to add a checkable menu entry to a toolbar menu that reads "Lock toolbars" and, when checked, locks the positions of all tool bars. I guess that it is a quite common feature.

I have managed to find a command that locks single bars via :

toolBar->setMovable(false);

But I cannot figure out how to lock all toolbars.

Edit

This question used to contain an inquiry concerning the toolbar context menu rather than the standard menu. Since I got an answer concerning the context menu elsewhere I removed it from this question.

How to add an entry to toolbar context menu in qt?

Answer 1

Here is an example of how you can achieve it. First, add a QAction and a QMenu; also, declare all your toolbars private :

private:
    QMenu*     m_pLockMenu;

    QToolBar*  m_pFileToolBar;
    QToolBar*  m_pEditToolBar;
    QToolBar*  m_pHelpToolBar;

    QAction*   m_pLockAction;

Also, declare a slot where you will manage the locking of your toolbars when the action will be triggered :

public slots :
    void lockActionTriggered();

Implement your slot. You just need to lock all the toolbars :

void lockActionTriggered()
{
    m_pFileToolBar->setMovable(false);
    m_pEditToolbar->setMovable(false);
    m_pHelpToolBar->setMovable(false);
}

Now, you just have to declare your main window in your .cpp, and add the menu, the toolbars and the action in it :

QMainWindow* mainWindow = new QMainWindow();

m_pLockMenu = mainWindow->menuBar()->addMenu("Lock Toolbars");

m_pFileToolBar = mainWindow->addToolBar("File");
m_pEditToolBar = mainWindow->addToolBar("Edit");
m_pHelpToolBar = mainWindow->addToolBar("Help");

m_pLockAction = new QAction("Lock", this);

Now, add the action to the menu :

m_pLockMenu->addAction(m_pLockAction);

And connect the QAction's signal triggered() to your slot :

connect(m_pLockAction, SIGNAL(triggered()), this, SLOT(lockActionTriggered()));

Don't forget to show() your main window :

mainWindow->show();

And it should be working now!

---

EDIT

Your code must look like this :

In the mainwindow.h :

class MainWindow : public QMainWindow
{

...

private:
    QMenu*     m_pLockMenu;

    QToolBar*  m_pFileToolBar;
    QToolBar*  m_pEditToolBar;
    QToolBar*  m_pHelpToolBar;

    QAction*   m_pLockAction;

public slots :
    void lockActionTriggered();
};

In the main.cpp:

int main(int argc, char *argv[])
{

    ...
    QApplication app(argc, argv);
    MainWindow window;
    window.show();

    app.exec();

}

In the mainwindow.cpp:

void MainWindow::createActions()
{
    m_pLockMenu = menuBar()->addMenu("Lock Toolbars");

    m_pFileToolBar = addToolBar("File");
    m_pEditToolBar = addToolBar("Edit");
    m_pHelpToolBar = addToolBar("Help");

    m_pLockAction = new QAction("Lock", this);

    m_pLockMenu->addAction(m_pLockAction);

    connect(m_pLockAction, SIGNAL(triggered()), this, SLOT(lockActionTriggered()));

    ...
}

void MainWindow::lockActionTriggered()
{
    m_pFileToolBar->setMovable(false);
    m_pEditToolbar->setMovable(false);
    m_pHelpToolBar->setMovable(false);
}